Hand brake



I. F. ocoNNOII.

HAND BRAKE. APPLICATION FILED AuG.23, 191s.

By my @Wg nitidi@ JOJN l?. OCONNOR, DE Ol-ICAGO, ELLINQES, .ASSGNOB TO VJ'ILLEAEE H. IfINER, OF

I CRAZY. LTE'W YORK.

HAND BRAKE.

Application tiled August 23, 191B.

To all @from l? may concer/it.'

Be it known that l, Jona* F. OCoNNon, a citizen oi the United States, residing;Y at Chicago, in the countj7 oi' Cook and State oi illinois, have invented a certain new and useful Improvement in Hand` Brakes. oi which the following' is a iull, clear, concise. and eXact description, reference being had to the accom anving` drawings, 'forming a part ot this speciiication.

My invention relates to improvements in hand brakes.

In the 'liorin or" my invention illustrated in the drawings, there is shown a hand brake especially adapted tor use upon railwax7 cars. n the said dra-wings, Fig'. 1 is a longitudi nal, vertical section of a hand brake embodying my invention., Fig. 2 is a vertical. trans verse section taken on line 2-2 ot Fir. 1. Fig. 3 is a cross sectiony taken on line 3 3 ot Fig. 1, Fin'. l is a cross section taken on line 4 4 ot Fig. 1 and Fig. 5 is a 'front elevation view of the worm comprising` apart ot the device.

Referringto the drawings, the numeral G indicates a casing or housing' in which the principal operating' parts ot the brake are received. The said housing is provided with suitable Hannes TJ?, aeriorated to receive the bolts 88, by means ot1 which the housins; is secured to the end oil' a car 9. The housing contains a chamber 10 through rwhich the brake stati 11 passes, the said brake stati' extending at its upper end through the top wall 112 of the housing. vWithin the chamber 10 there is mounted upon the brake staff 11 the worin 12, which is secured against rotation on the shatt b v the engagement oif the non-circular portion 13 the perforation 11i through which the brake -staif extends upon the non-circular portion 15 of the brake statt, the said noncircular portions in the struct-ure shown in the' drawingbeine; oilsubstantiallv square conformation. Near its lower end, the worm journaled in the bracket 16 and the said worm is providedV at its lower end with a retaining washer 1'?, which is held against accident-al displacement by the pin 18 passino' through registering perforations in the nut and the worm. At is upper end, the worin is provided with a iiann'e 20 and on its upper surface is formed with the ratchet teeth 21, which are adapted to be engaged by the locking pawl 22, the said locking or retaining Specification of Letters Patent.

Tater-ated Jan. 1li, semi no. 251,075.

pawl being provided' with a hollow handle 123 which is pivoted, as at 124e, to the bracket and encloses the upper end L5 ot he brain` stati 11, thus 'forming hand-hold tor the operator well as a handle for the locking` or retaining pawl. The worin is provided upon its periphery with the helical grooves and teeth 122, which are engaged b v the interiorly formed Lgrooves 2? and teeth 2e ot the operating nut 25, which intereng'ago with the teeth and grooves oi the worm'. The said operating` nut 25 is provided. at its up* per end, with an outwardlj.' extending-r tienne 26, which is adapted to engage the 'flange Vat the upper end ot the worinand thus limit the upward travel ot the nut when the device is operated, as hereinafter described. The operating` nut 25 is mounted wit-hin a collar or band 126, the said collar being associated with an operating' lever 2T having; u handle 2S at outer end yand a biturcated inner end pivoted to the casing at its itulcrum n point 2S) bjv a pin or bolt SO, which operatesin a sli htlj7 elongated opening 31 to permit the pump-handle action ot the lever hereinafter referred to. he bifurcated arms ot the lever 27 are indicated at 532-32. Said arms 32 are provided or: their inner faces with lugs or bosses which pass through corresponding` ycircular openings in the collar 126 and also into an annular groove 133 formed in the nut 25.

In order to operate thebrake and wind up the brake chain (the latter not being' shown but understood torbe wound on the lower end of t-he staff 11) the operator moves the lever 27 up and down. Upward movement oit the lever 27 will lift the collar 126 until the teeth 34 on the. top thereof engage the cooperating; teeth 35 on the under side ot the dance of the nut 25. ln this connection, it will be understood that the annular Igroove 133 in the nut- 25 is of sufficient vertical height to accommodate this relative movement between the collar 126 and .the nut 25. After the teeth 34 and 35 have been thus engaged, continued upward movementot the lever 27 will obviously raise the nut 25 but without rotation oi3 the latter so that the stati 11 will be positively rotated due to the threaded engagement between 'the nut and the staE. Suchvupward ymovement of the lever 27 may be continued until the 'Hannie 26 engages the flange 20. Obviously after the sta@ is rotated, it will be held by the lockingdog22.

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vWhen t-he handle 27 is next lowered, the collar 126 will fall downwardly at first so as .to disengage the teeth 34. and and as continued downward movement ol the lever and collar occurs, the nut 25 will be pulled down by the lugs 33 engaging the bottom edge ot thel groove'V 133 therein. However, during the downward movement of the nut 25 the nut will be free to rotate without imparting any rotating movement to the statt. Repetition of the upward movement ci? the lever 2T will cause further rotation. ot the staif as will be evident and the downward'action can be repeated.

During the pump handle action o'l the lever, asabove described, it is evident that the Aoperator may use one hand to actuate the lever and with the other can grasp the handhold 123 if he desires or some suitable part of the car. The staff can be released entirely by disengaging'the` locking` pawl or dog 22. as will be evident, but if the brakeman desires to gradually ease off the brake chain, he may readily do so by disengaging the locking dog 22 whenthe lever, collar and nut are in their uppermost position and the collar and nut inr clutchcd engagement.v By

lowering the lever gradually while the collar and nut are thus in clutched engagement, it is evident that the reverse-d rotation or release movement of the staff l1 can be graduated. p

I claim: I

l. ln ay device of the character described,

the combination with a member to be rotated,

and means for rotatably supporting said V member and holding the same against .longe tudinal movement, of an actuating element movable longitudinally olf said member and having threaded engagement manually operated means for imparting longitudinal nonrotativ'e movement to said element in one direction to thereby impart rotative movement in one direction to said member, V means for holding said member against accidental rotation inthe reverse Y direction, and means permitting Acombined rotation Vand longitudinal movement under I, manual control in the opposite direction oli said element. f

2. In a device of the character described, the combination with a vertical brake staff adapted forrotation, and means for rotat ably supporting said staff and holding the same against longitudinal.movement, or' an actuating .element vertically movable relatively to said stall'- and having threaded engagementv therewith, means, Ifreely movable into operative engagement with .said element, lfor imparting vertical up and down movement said elementl relatively to the Asecured to the housing.

therewith, y

staff, and means. for preventing rotation of said element when moved 'vertically in lonel direction, said last named means being rendered inoperative when the element is moved inthe opposite direction to thereby peiiniti said element to. rotate when moving vertically in said opposite direction.

3. In a. brake, in combination, a staff, a worm upon the staff, an operating nut tor said worm, a lever to move the Vnut upon the worm and a holding` pawl, the wormbeing provided with teeth adapted vto be engaged by the` holding pawl.

ll. ln a brake, in combination, a housing, a staff upwardly extended through said housing, operatingmechanism for said staf, a holding pawl for-said mechanismKV the said holding pawl having a'hollow Vhandle mount-` ed Vover the endV of the staff and pivotally 5. In a brake, a staff, a bracket adapted to .hold the staif, operating mechanism as-y sociated with said staff, a handhold upon said brake, theV- hand-hold enclosing one end of the staff and being pivotally connected to the bracket, Athe said'hand-hold being provided with a holding pawl for the operatf ing mechanism. l

6. ln a brake, in combination, a housing, a stall' passing through said housing, a worm within said housing `mounted upon the staff, an operating nutV associated with` the worin, a lever pivotally connected tothe .housing7 a collar having a. toothed engagement. with the nut and a pivotal connection with the lever, and a holding awl for the worm, theholding pawl having a hollow handle enclosing the end ot the stai-fand pivotally connected tothe housing, the Worm being pi-ovidcdwithteeth adapted to be engaged by the holding pawl.. l v

' Tfrl'n a brake for railway cars andthe like. the combination with/a vertical brakeV staff; of a worm securedto said s tai .and held against rotation with respect thereto",`

a nut mounted on said wormv and slidablev lengthwise thereof; a collar on said nut adapted for a limited amount ot'movem'ent I,

freely lengthwise of Vsaid nut; eo-operatingf means on said nut and collar .adapted toy .lock the same against relative rotation when,

ment with said nut; and releasable means ttor holding said staff against rotation in an unwinding direction.

In witness that I have hereunto lsubscribed my namegthis 19th day ofxAug. 1918. 'y n v JOHN F. -OCOhlhlOR` cla-im theforegoing I7 

